Body Fat Calculator
Estimate your body fat percentage using simple body measurements.
Body Fat Estimator (U.S. Navy Method)
Enter measurements in centimeters (cm) and weight in kilograms (kg).
Estimated Body Fat
12.9%
Fat Mass
9.0 kg
Lean Mass
61.0 kg
Based on your measurements, your estimated body fat percentage is 12.9%. This is calculated using the U.S. Navy method, which provides a reasonable estimate without clinical equipment.
Calculation Breakdown
BFP = 495 / (1.0324 - 0.19077 × log10(waist - neck) + 0.15456 × log10(height)) - 450
BFP = 495 / (1.0324 - 0.19077 × log10(80 - 38) + 0.15456 × log10(175)) - 450 ≈ 12.9%
Example
A male who is 180cm tall with a 85cm waist and 40cm neck would have an estimated body fat percentage of around 16.6%. This helps track body composition changes over time, which is often more meaningful than tracking weight alone.
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